User ID and User Key pair API authentication

<?xml version="1.0"?>
    <userid>[UserID]</userid> <!-- required-->
    <userkey>[UserKey]</userkey> <!-- required-->
    <!-- query params -->
    "query": {
        "userid": "[UserID]", // required
        "userkey": "[UserKey]", // required
        "action": "[Action]" // required
        // query params

A unique user identifier. This number can be found in the My Account tab of the Client Interface.

A user’s unique authentication key string. Created automatically when a user is created and can be regenerated at anytime in the My Account tab of the User Interface.




Please note that regenerating the UserKey will invalidate the previous, and API requests using the old UserKey will error out.